How does one make a graphics card with a 192-bit bus and yet with 2GB of video memory? Usually, 2048MB are provided by 8 x 2Gbit chips handled by a 256-bit bus. To use a 192-bit bus and still have 2GB video memory, one would need something like 12 memory chips of different capacity. However, in this case we see 8 x 2Gbit memory chips, yet two of the three 64-bit memory controllers work as usual, each with 2 memory chips (2 x 32-bit = 64-bit), and the third controller works with 4 memory chips (4 x 16-bit = 64-bit). This is obviously cheaper than going with 12 memory chips.